Previous year MCQs

General science UPPSC 2017 GS-I
Question

Five bulbs each of 100-watt capacity in a tunnel are illuminated continuously for twenty hours. The consumption of electricity will be:

Answer & Solution

Answer: (Detailed Solution Below)

Option B: Ten units

Detailed Solution:

The correct answer is “Ten units”.
Electricity consumption (in units) = (Power in watts) × (Time in hours) / 1000

Electricity consumption = (5 bulbs × 100 watts/bulb) × (20 hours) / 1000
= 500 watts × 20 hours / 1000
= 10 units

Similar Questions:

Harmful ultra-violet radiation coming from the sun can cause:
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  2. B) Brain cancer
  3. C) Oral cancer
  4. D) Dermal cancer
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Code:

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  1. A) 1 and 2
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